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Finding the Fourth Proportional to 135.52, 203.40 and 99.28

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Solution

The fourth proportional to 135.52, 203.40 and 99.28 is: 149.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.52 : 203.40 = 99.28 : x
  2. Step 2: Convert to fraction form
    135.52/203.40 = 99.28/x
  3. Step 3: Cross multiply
    135.52x = 203.40 × 99.28
  4. Step 4: Simplify right side
    135.52x = 20,193.55
  5. Step 5: Solve for x
    x = 20,193.55/135.52
  6. Step 6: Final answer
    x = 149.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.